We average around 3-4 times a week.. Alot depends on DD and if she stays asleep long enough

plus Dh is just too tired during his working week (2 days then 2 nights then 4 days off)

We occassionally go through stages where it might be only once a week or when Dh is on holidays every night.. but average is 3-4 times a week..

I think it is possible even when you have a few children.. kids sleep at night and if we think DD is going to wake before we are ready for bed then we wait for the kids to go to bed and duck to bed for a quicky then get up and go to bed later